Three-hop MIMO relaying systems in gaussian broadcast channels

Do Hoon Kim, Young-Chai Ko, Seungkeun Park

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this paper, we consider the three-hop MTMO relaying systems, based on the amplify-and-forward (AF) protocol, where there arc two relay nodes both of which are equipped with multiple antennas, over Gaussian broadcast channels. We also consider that the base station (BS) broadcasts the signals to multiple distributed users via two relay nodes, that is, three hops, using a zero-forcing dirty paper coding (DPC). We propose three different relaying strategics depending on adopting the power loading from the antennas of each relay node. We calculate both the lower and the upper bounds of the sum capacity of the different relaying strategics we proposed and compare these lower and upper bounds with the sum capacity of the decodc-and-forward (DF) protocol based system. In our paper we derive the optimal power allocation at both relay nodes and the BS by using the geometric programming. The simulation results show that our proposed relaying strategics can achieve a similar sum capacity with the upper bound of the three-hop multiuser MIMO relaying system, and these outperform the two-hop multiuser MTMO relaying system proposed in [1] or the multiuser MIMO system without relays in terms of the sum capacity.

Original languageEnglish
Title of host publication2nd International Conference on Signal Processing and Communication Systems, ICSPCS 2008 - Proceedings
DOIs
Publication statusPublished - 2008 Dec 1
Event2nd International Conference on Signal Processing and Communication Systems, ICSPCS 2008 - Gold Coast, QLD, Australia
Duration: 2008 Dec 152008 Dec 17

Other

Other2nd International Conference on Signal Processing and Communication Systems, ICSPCS 2008
CountryAustralia
CityGold Coast, QLD
Period08/12/1508/12/17

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Keywords

  • relays, ad-hoc, multihop channels, multi-input multi output (MIMO) systems, Broadcast channel (BC)

ASJC Scopus subject areas

  • Signal Processing
  • Electrical and Electronic Engineering
  • Computer Networks and Communications
  • Communication

Cite this

Kim, D. H., Ko, Y-C., & Park, S. (2008). Three-hop MIMO relaying systems in gaussian broadcast channels. In 2nd International Conference on Signal Processing and Communication Systems, ICSPCS 2008 - Proceedings [4813661] https://doi.org/10.1109/ICSPCS.2008.4813661